A compact six-port Multiple-Input Multiple-Output (MIMO) antenna that operates in the whole license-free Ultra-Wideband (UWB) spectrum of 3.1–10.6 GHz is shown in this research study. The six antennas are arranged in a way that allows for spatial variety. Conventional rectangular patch UWB antennas make up the antenna elements. This innovative MIMO antenna took into consideration and addressed the four main issues with antennas: low radiation efficiency, high mutual coupling, low impedance, and poor voltage standing wave ratios (VSWR). The microstrip patch approach was used in a Computer Simulation Technology (CST) environment to build the antenna. The antenna substrates were designed and all simulations were carried out using CST. The patch antenna material is copper, and the antenna's ground plane is FR-4 for the substrate design. The antenna has a 50-impedance feedline and measures 30 x 25 x 0.3 mm. After the performance characteristics of the antenna were examined, the S-parameters showed a broad frequency response ranging from 3.1 to 10 GHz. With a radiation efficiency of less than - 1dB (68%) over the frequency range, the system as a whole loses less power than is absorbed, making it extremely dependable. The system can have a positive maximum reflection since the antenna's VSWR is more than 1 and less than 2. As a result, this architecture works well for communication systems that need to transmit signals quickly and effectively.